How to place lights to make a diamond look more realistic??????thanks

[sigma]

Caustics :thumbsup:

http://www.3dluvr.com/intercepto/maya/tutorials/mray_caustics/caustics_introduction.htm

[mark_wilkins]

also, flare in the specular highlights helps a WHOLE lot too. Usually you'll want to do flare as a 2D post-process because in a real camera it happens in the optics, in front of all the objects in the scene.

-- Mark

P.S. I don't mean the cheezy "lens flare" effect found in so many packages, but something that looks like real flare. Try pulling out the highlights from your render with a threshold operation and blurring, then adding (or multiplying) back in.

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